John ii



J. H. DEPPELER.

GRINDING MACHINE. APPLICATION FILED MAR. 21. 1913.

l 1 93%43 Patented Aug. 1, 1916. fim M WITNESSES INVE/l/TOR HIS ATTORNEY 1n Nam-us Pumas ca, Imam-14mm. wnsumamu. a. c

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JOHN H. DEPPELER, OF JERSEY CITY, NEW JERSEY, ASSIGNOR '10 GOLDSCHMIDT THERMIT COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

GBINDING-LEAGHINE.

Application filed March 27, 1913.

To all whom it may concern Be it known that I, JOHN II. DnrrnLnR,

follow any depressions or irregularities in the surfaces of such treads, and thus up and down movement is transmitted to the grinding means mounted on the truck, which makes it difficult and well nigh impossible to grind such surfaces to a horizontal plane with the means heretofore employed for that purpose.

The principal object of the present invention is to provide a support for the grinding means proper which will prevent the grinder from following depressions and irregularitics in the rail tread. In order to accomplish this result, I make use of supporting means independent of the wheels of the main truck and of the truck itself, and also of the grinding means carried by the truck, and mount the grinding means in such a manner as to provide an extended support that will reduce to the minimum vertical motion due to irregularities in the surface to be dressed.

The preferred construction is one in which one or more auxiliary roller-trucks are so constructed as to receive and support the main truck carrying the grinding means, the auxiliary trucks being removable from the machine proper and having no connection with it except when in use. The object of this is to permit a truck constructed in the ordinary manner, carrying grinding means of the usual construction, to be moved in the ordinary way along a surface to be dressed, the auxiliary supporting means or rollertrucks being brought into position and action only after the main machine has arrived at the desired point. At such time the aux- Specification of Letters Patent.

Patented Aug. it, 191%.

Serial No. 757,095.

iliary supporting means will be placed in positlon and will preferably support the wheels of the main truck directly. In addition to this there will also preferably be a driving connection between the rollers of one of the auxiliary trucks and the mechanism on the main truck, this connec tion being usually due to frictional contact of one of the driven wheels of the main truck with supporting rollers of an auxiliary truck.

Other features of the invention not hereinbefore referred to will be hereinafter described and claimed and are illustrated in the accompanying drawings, in which Figure 1 is an end elevation of a grinding machine embodying the present invention, said machine being shown in operative relation with track-rails (in section); Fig. 2 is a side elevation of the same, showing the grinding means in position for dressing a surface; Fig. 3 is an enlarged sectional side elevation of a portion of said machine showing one of the roller-trucks of the auxiliary supporting means and a wheel supported thereby upon a track-rail, and Fig. 4 is an end elevation and transverse section of the same.

Similar characters designate like parts in all the figures of the drawings.

My present invention may be embodied in, or combined with, any suitable grinding machine. It is illustrated in connection with. a type of rail-grinder well known in the art, and most of the elements of the machine shown are or may be those ordinarily found in such rail-grinders.

The machine illustrated has a main frame, designated generally by 2, having at its opposite ends axles, 3 and 4, suitably mounted in bearings and carrying supporting wheels, such as 5 and 6, these being the main elements of what will be herein termed the main truck of the present grinding machine. Suitably mounted upon the frame 2 is the grinding apparatus. In the construction shown, which is intended specifically for the dressing of the surfaces of two parallel track-rails of a railroad, two separate grinding means are illustrated. Each comprises a suitable motor (shown as an electric motor) from which movement is imparted to a grinding wheel suitably mounted in bear ings. Here the two motors are designated respectively by 7 and 8, and transmit the movements of their shafts, as by means of belts 9 and 10, to grinding wheels, one of which is shown at 11. Provision may be made for shifting the grinding wheels crosswise of the main truck and also vertically thereof. Here the grinding wheel 11 is shown as mounted at the lower end of a bracket, 12, which is adjustable up and down on a vertical slide, 13, as by means of a hand-wheel, 1 1, having suitable connections for imparting vertical movement to the grinding-wheel; and transverse movement may be imparted to the bracket 12 by mounting its vertical slide 13 on a cross-slide, 15, a transverse adjusting screw being shown at 16 for controlling such crosswise movement. In addition to these parts there will also preferably be suitable provision for moving the main truck a short distance along the rails when it is desired to locate it with accuracv in position for grinding a given portion of a rail surface. The means illustratec for this purpose comprises a vertical shaft, 17, having at the lower end thereof a worm,

I 18, meshing with a worm-wheel, 19, in fixed relation with one of the wheels 5 of the main truck. The vertical shaft 17 has at its upper end a hand-wheel 20, by means of which it may be turned and the main truck correspondingly moved a short distance to locate the machine in the exact position desired. In order that the truck may be readily moved along the rails at other times, the parts 17, 18 and 20 just described are preferably so mounted that they may be swung out of operative relation with the wormgear 19, all of them being illustrated as pivoted at 21 for this purpose. All of the parts just described are or may be those found in rail-grinding machines known to the art.

In connection with a wheeled main truck such as just described and with suitable grinding means carried thereby, I employ auxiliary supporting means, preferably detachable from these parts, so that the main wheeled truck and the grinding means supported on it may be used either alone or in connection with such auxiliary supporting means. Nhen the auxiliary supporting means is not in place the main truck and the grinding means may be employed to dress certain portions of the rail surfaces. The auxiliary supporting means, however, will preferably be placed in position whenever the irregularities in the surfaces to be dressed adjacent the points of support of the main truck are such as to bring about an undesirable vertical movement of the grinding wheel, 11, as for example, when the main truck is moved back and forth in the operation of grinding the surface to be dressed to a horizontal plane. In order to prevent such vertical movement I make use of auxiliary supporting means having a relatively long contact surface for supporting the grinding machine, this auxiliary supporting means preferably comprising one or more roller-trucks with extended supporting surfaces. The construction shown is one in which a series of such roller-trucks carry the wheels of the main truck, one roller-truck being employed for each of the wheels 5 and (3 shown. Each of the rollertrucks illustrated comprises a frame, 22, having rollers, such as 23 and 21, mounted therein with their axes in the same hori zontal plane. The rollers 23 also have, in this case, side flanges similar to those of the wheels 5 and 6 and for a similar purpose.

The construction of the frame 22 may be any suitable for the purpose, and the rollers 23 and 24: may be mounted in it in any suitable manner, provided that the points at which the rollers of each truck engage the surface to be dressed are in the sam plane. The object of using an extended support, having a plurality or series of contact points spaced away from each other, is to reduce the vertical movement of the grinding wheel or wheels which would take place if there were but a single point of contact with the surface to be dressed. By providing a plurality of such contact points in a given small Zone, if there is a substantial depression or worn spot under one of the rollers of the series mounted in a roller-truck, the remaining rollers of that series will rest upon higher points of the surface to be dressed, and the normal level of the grinding means will be maintained. It will be clear that a similar advantage results from using another roller-truck adjacent the point of contact of the wheel 6, for example, with the surface or rail to be dressed; and when two such roller-trucks, each with a series of rollers spaced relatively far apart, are employed, one adjacent the wheel 5 and the other adjacent the wheel 6, the relative up and down movement between the truck and the rail or other surface to be dressed is reduced at both ends of the truck, and the grinding means is maintained in a substantially uniform relation to any given horizontal plane of the surface being ground. It will of course be understood and it is shown clearly in Fig. 1, that at least four roller-trucks of the character described will be employed when the machine is one adapted for traveling upon, and simultaneously dressing, the surfaces of a pair of rails, such for example, as are shown at 1. Any desired additional number of trucks may be used.

In grinding machines as ordinarily constructed, and particularly rail-grinders, it is desirable not to change in any way the construction or mode of operation of satis factory existingmachines. In rail-grinders especially it is desirable that the general type of macliine-emhodying a main truck and flanged wheels mounted therein and adapted to support the truck and grinding means, and to travel on track-railsbe retained unchanged, as such a machine as ordinarily constructed is an entirely satisfac tory means for grinding many portions of the treads of track-rails. For this reason ll. prefer to embody the feature of an extended support or base in auxiliary supporting means, which may be readily and wholly removed from the grinding machine proper. The construction shown is one in which each roller-truck is adapted to receive and support one of the wheels and 6, elevating it sufliciently above its normal position to permit the rollers of the roller-truck to travel upon the tread of the rail. H ere the wheels 5 and 6 rest directly upon the rollers M, which are not flanged, and the flanged rollers and the rollers 24- talte the place of the main wheels 5 and 6, as lateral locating de vices, the wheels 24 taking the place, in this case, of the wheels 5 as traction-wheels.

An important feature of the present case is the provision of means for applying power to one or more of the roller-trucks from the main truck, to propel said rollertrucks and with them the main truck and the grinding means. The devices hereinbefore described, to wit, the worm-gearing 1S19 operated by the handle and the shaft 17, constitute in this case a means for driving the roller-trucks and the main truck, through power applied through the engaging surfaces of the wheels 5 and the rollers 52%. it will be seen from the drawings that by merely placing each roller-truck in its proper position under and in contact with the proper wheel of the main truck, the main truck and all of its parts, including the grinding means, will be supported by means wholly separate from them and yet that there will be a constant driving connection for moving or propelling all of these parts along the track, so long as the roller-trucks are in place.

In order that all of the rollers or wheels of the roller-trucks cooperative with the wheels 5 may be positively driven, the rollers or wheels 23 and 2d of the trucks cooperating with said wheels are shown as having shafts, 25, and 26, with sprocketwheels, 27 and 28, around which pass sprocket-chains, 29, by means of which the positively driven rollers 26% also positively drive the rollers 28 of these trucks.

What I claim is 1. In a grinding machine, the combination with grinding means, of a wheeled main truck for supporting said grinding means for operation, auxiliary supporting means constructed to receive and support said main truck by engagement with the wheels thereof and having a relatively long contact surface for supporting the grinding machine, and means carried by said main truck for imparting traveling movement to said auxiliary supporting means.

2. In a grinding machine, the combination with grinding means of a wheeled main truck for supporting said grinding means for operation, and auxiliary supporting means constructed to receive and support said main truck and having rollers spaced a considerable distance apart with their contact points in alinement and located at opposite sides of the grinding point.

3. In a grinding machine, the combination with grinding means, of a wheeled main truck for supporting said grinding means for operation, and auxiliary supporting means constructed to receive and support said main track and having rollers spaced a considerable distance apart with their contact points in alinement and on some of which rollers the wheels of said main truck rest.

4. In a grinding machine, the combination with grinding means, of a wheeled main truck for supporting said grinding means for ope 'ation, an auxiliary roller-truck constructed to receive and support said main truck and the rollers of which are spaced a considerable distance apart and have alined contact points, and means carried by said main truck for imparting traveling movement to said roller-truck.

5. In a rail-grinder the combination with grinding means, of a wheeled main truck movable along a rail and supporting said grinding means for operation means for positively driving one of the wheels of said truck, and auxiliary supporting means constructed to receive and support said main truck and having rollers with alined contact points adapted to travel on said rail and one of which rollers is adapted to be brought into operative relation with and driven by said driven wheel of the main truck.

6. In a rail-grinder, the combination with grinding means, of a wheeled main truck movabl along a rail and supporting said grinding means for operation, means for positively driving one of the wheels of said truck, and auxiliary supporting means constructed to receive and support said main truck and having a series of rollers with alined contact points adapted to travel on said rail and two of which rollers are adapted to be brought into operative relation with and driven by said driven wheel of the main truck and other rollers of said series being operatively connected with said driven rollers to be driven thereby.

7. In combination with a wheeled main truck and means for driving one of the wheels of said truck, of auxiliary supporting means constructed to receive and support said main truck and having a series of rollers With Signed at I-Ioboken, in the county of Hudalined Contact points, two of Which rollers son and State of New Jersey, this 19th day are adapted to be brought into operative reof March, A. D. 1913.

la-tion With and driven by said driven Wheel JOHN H. DEPPELER. of the main truck and other rollers of said lVitnesses:

series being operatively connected with said l/VM. B. STILES,

driven rollers to be driven thereby. GEORGE T. BORRAGK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

